Tuner Section - Sony CFD-V77S Service Manual

5-3.

TUNER SECTION

• Switch Location
VOLUME
MEGA BASS
PRESET SOUND MODE : OFF
MW SECTION
Setting :
FUNCTION switch : RADIO
BAND : MW
Signal generator
MW RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
FM SECTION
Setting :
FUNCTION switch : RADIO
BAND : FM
Signal generator
FM RF signal
generator
75kHz (100%) amplitude modulation
by 1kHz signal.
Output level : as low as possible
set
SW SECTION
Setting :
FUNCTION switch : RADIO
BAND : SW1/SW2
FINE TUNING knob : mechanical mid
AM rf signal
generator
30% amplitude modulation by 400 Hz
signal output level : as low as possible
set
0 dB = 1 µV
: MAX
: OFF
Put the lead-wire
antenna close to
the set.
0.01 µ F
telescopic
antenna
input
level meter
32 Ω
+
–
J301 (phones)
telescopic antenna
input
10 pF
set
level meter
32 Ω
+
–
J301 (phones)
• Repeat the procedures in each adjustment several times for the
maximum level meter indication.
• The frequency coverage and tracking adjustments should be
finally done by the trimmer capacitors.
Adjust for a maximum reading on level meter.
T2
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
CT3
MW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
CT4
Adjust for a maximum reading on level meter.
T1
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 86.5 MHz(87.35 MHz )[87.0 MHz]<87.35 MHz>
CT1 109.5 MHz(108.25 MHz )[108.3 MHz]<108.25 MHz>
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L2 86.5 MHz (87.35 MHz )[87.0 MHz]<87.35MHz>
CT2 109.5 MHz (107.8 MHz)[108.3 MHz]<108.25 MHz>
SW1 FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L6
2.2 MHz
SW1 TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L5
2.2 MHz
SW2 FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L8
6.8 MHz
SW2 TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L7
6.8 MHz
( ) : Saudi Arabia model
[ ] : AEP model
< > : Italian model
Adjustment Location : Main board (See page 13)
— 11 —
MW IF ADJUSTMENT
455 kHz
620 kHz
1,400 kHz
520 kHz (516 kHz)<516 kHz>
1,680 kHz (1,630 kHz)<1,630 kHz>
FM IF ADJUSTMENT
10.7 MHz
CT6
7.3 MHz
CT5
7.3 MHz
CT10
22.5 MHz
CT9
22.5 MHz